I would second previous replies. The decision should be based on a number of factors:
- do you plan to offer the same features on other platforms and if so how much effort can you save by developing core functionality in a portable format?
- will your app require complicated animations or integration with technologies not easily accessible through a hybrid framework (Cordova, PhoneGap, etc)
- also look at the talent you have access to. If you have an awesome iOS or Android developer, it may make sense to develop a native version first.